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Extech RH250W Hygro-Thermometer

Extech Instruments
SKU: EXTERH250W
  • Bluetooth + ExView App with live RH and temperature monitoring, sharing and reporting
  • Trends, logging, and alarms to support building health and maintenance checks
  • Clear backlit display with min/max, data hold, and CSV/PDF export with photo notes
More Info
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Extech RH250W Hygro-Thermometer

The Extech RH250W Hygro-Thermometer is a compact Hygro-Thermometer that has Bluetooth connectivity, allowing for building and maintenance professionals to view and share both relative humidity and temperature data directly from a mobile device when using the free ExView App. With the capability to capture data, display trends, set visual and audio alarms, and send reports, users are able to gain deeper insights on building health and equipment.

The RH520W features a large backlit LCD display, with information also able to viewed from an iOS or Android mobile device using the ExView App, via Bluetooth. The user can simultaneously monitor relative humidity and temperature data, as well as record min/max readings, and freeze the display with the ‘data hold’ feature. .CSV data can also be exported, and PDFs can be created and sent, including photos of the measurement location taken with a connected smartphone or tablet camera.

The RH250W is part of the Extech Connected 250W Series, designed to streamline measurement, documentation, and reporting. Using the ExView app, users can connect to compatible 250W Series instruments to view readings in real time, build a clearer picture across multiple locations, and generate shareable reports for maintenance records, commissioning notes, and ongoing building health checks.

Extech part number: RH250W

Key Features

  • Bluetooth connectivity with the free ExView app for live viewing and sharing
  • Simultaneous measurement of relative humidity and air temperature
  • Trend view and data logging via the app, with high and low alarm limits
  • Large backlit LCD with min and max readings plus data hold
  • Export CSV files and create PDF reports, with the option to include photos
Specification
  • Relative Humidity – 0 to 100% RH
  • Relative Humidity Basic Accuracy - ±5% RH
  • Relative Humidity Max Resolution – 0.1% RH
  • Response Time – 1 sec
  • Sampling Rate – 1s
  • Temperature (Air) – 14 to 140°F (-10 to 60°C)
  • Temperature (Air) Basic Accuracy - ±2.0°F (±1.0°C)
  • Temperature (Air) Max Resolution – 0.2°F (0.1°C)
  • Wireless Connectivity - Bluetooth® (via ExView iOS/Android mobile app)
  • Wireless Transmission Range – up to 90m line of sight
  • Certifications – CE, FCC, UKCA
  • Dimensions – 5.9 x 2.1 x 1.1in (150 x 53 x 28mm)
  • Operating Conditions – 32 to 104°F (0 to 40°C), ≤80% RH
  • Power – 3 x AAA (1.5V) batteries
  • Warranty – 2 years
  • Weight – 2.8oz (80.5g)
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